Charles Schwarz will face a familiar adversary next month as outgoing U.S. Attorney Alan Vinegrad has decided to personally prosecute the ex-cop’s fourth trial – set to begin weeks after the top lawyer leaves his Brooklyn post.

Vinegrad’s announcement yesterday followed close on the heels of news that a single juror’s prejudices may have stolen a conviction from prosecutors at the most recent Abner Louima assault trial.

A hung jury found Schwarz guilty of perjury, but could not reach agreement on whether the ex-cop held Louima while another officer sodomized him with a broken broom in the 70th Precinct station-house bathroom, or conspired in the attack.

“Particularly in view of the recent revelation that bias may have played a role in thwarting the jury’s ability to return a unanimous verdict of guilty on all counts, it is all the more imperative that this defendant be held accountable for his criminal conduct and that all reasonable steps be taken to ensure that result,” Vinegrad said in a prepared statement.

The prosecutor agreed to stay on at the request of incoming U.S. Attorney Roslynn Mauskopf, who will be sworn in on Sept. 3.

This week, jury foreman Russell Birnbaum shed his anonymity to speak out, claiming a female juror was bent on acquitting Schwarz but refused to explain her position, repeatedly dismissing their arguments with “a condescending giggle” and a wave of her hand.